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Journal of Bone and Joint Surgery - British Volume, Vol 89-B, Issue 1,
57-61.
doi: 10.1302/0301-620X.89B1.18223 Copyright © 2007 by British Editorial Society of Bone and Joint Surgery Development of genu varum in achondroplasiaRELATION TO FIBULAR OVERGROWTHS. T. Lee, MD, PhD, Professor1; H. R. Song, MD, PhD, Professor2; R. Mahajan, MS, DNB, Fellow2; V. Makwana, DOrth, Fellow2; S. W. Suh, MD, Associate Professor2; and S. H. Lee, MD, Professor3
1 Department of Orthopaedic Surgery, Konkuk University Hospital, 1 Hwayang-dong, Gwangjin-Gu, Seoul, 143-701 Korea. Correspondence should be sent to Professor H. R. Song; e-mail: songhae{at}korea.ac.kr
Genu varum in the achondroplastic patient has a complex and multifactorial aetiology. There is little mention in the literature of the role of fibular overgrowth. Using the ratio of fibular to tibial length as a measurement of possible fibular overgrowth, we have related it to the development of genu varum. Full-length standing anteroposterior radiographs of 53 patients with achondroplasia were analysed. There were 30 skeletally-immature and 23 skeletally-mature patients. Regression analysis was performed in order to determine if there was a causal relationship between fibular overgrowth and the various indices of alignment of the lower limb. Analysis showed that the fibular to tibial length ratio had a significant correlation with the medial proximal tibial angle and the mechanical axial deviation in the skeletally-immature group. We conclude that there is a significant relationship between fibular overgrowth and the development of genu varum in the skeletally-immature achondroplastic patient.
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